Question

Define resistance of a conductor. State the factors on which resistance of a conductor depends. Name the device which is often used to change the resistance without changing the voltage source in an electric circuit.
Calculate the resistance of 50\ \text{cm}50 cm50, space, start text, c, m, end text length of wire of cross sectional area 0.01\ \text{mm}^20.01 mm
2
0, point, 01, space, start text, m, m, end text, squared and of resistivity 5\times10^{-8}\ \Omega\text m5×10
−8
Ωm5, times, 10, start superscript, minus, 8, end superscript, space, \Omega, start text, m, {\text}​

Answer 1

Explanation:

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Answer 2

Answer:

The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature.

Resistivity is defined as the measure of the resisting power of a specified material to the flow of an electric current.

$r p \times \frac{a}{1}$